@font-face{font-family:Inter;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/inter-var.woff2)format("woff2")}@font-face{font-family:Space Grotesk;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/space-grotesk-var.woff2)format("woff2")}:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light 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1px 2px #0f172a0f, 0 1px 3px #0f172a1a;--shadow-2:0 2px 4px #0f172a0f, 0 8px 20px #0f172a1a;--shadow-3:0 6px 16px #0f172a1a, 0 20px 40px #0f172a1f;--font-sans:"Inter", -apple-system, "Segoe UI", system-ui, "Helvetica Neue", sans-serif;--font-display:"Space Grotesk", "Inter", -apple-system, system-ui, sans-serif;--font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;--app-bar-height:64px;--content-width:960px}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--color-canvas:#0b0d12;--color-surface:#151823;--color-surface-container-low:#1b1f2b;--color-surface-container:#232837;--color-surface-container-high:#2c3240;--color-surface-variant:#2c3240;--color-on-surface:#f1f5f9;--color-on-surface-variant:#94a3b8;--color-outline:#6b7385;--color-outline-variant:#242938;--color-primary:#818cf8;--color-on-primary:#1e1b4b;--color-primary-container:#3730a3;--color-on-primary-container:#e0e7ff;--color-secondary-container:#3730a3;--color-on-secondary-container:#e0e7ff;--color-error:#f87171;--color-on-error:#450a0a;--color-error-container:#7f1d1d;--color-on-error-container:#fee2e2;--color-success:#4ade80;--color-success-container:#14532d;--color-on-success-container:#dcfce7;--color-warning:#fbbf24;--color-warning-container:#78350f;--color-on-warning-container:#fef3c7;--accent-beginner:#34d399;--accent-intermediate:#60a5fa;--accent-advanced:#a78bfa;--shadow-1:0 1px 2px #0006, 0 1px 3px #0000004d;--shadow-2:0 2px 4px #0006, 0 8px 20px #0006;--shadow-3:0 6px 16px #0006, 0 20px 40px #00000080}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--color-canvas);color:var(--color-on-surface);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;font-size:16px;line-height:1.6}h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.02em;font-weight:600;line-height:1.2}h1{font-size:clamp(1.9rem,1.4rem + 2vw,2.75rem)}h2{font-size:1.5rem}h3{font-size:1.15rem}a{color:var(--color-primary);text-underline-offset:3px}:focus-visible{outline:3px solid var(--color-primary);outline-offset:2px;border-radius:var(--radius-xs)}code,pre{font-family:var(--font-mono)}::selection{background:var(--color-primary-container);color:var(--color-on-primary-container)}.skip-link{background:var(--color-primary);color:var(--color-on-primary);padding:var(--space-2) 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#6366f1);color:#fff;letter-spacing:.02em;place-items:center;width:36px;height:36px;font-size:.8rem;font-weight:700;display:inline-grid;box-shadow:0 2px 6px #4f46e559}.top-nav{align-items:center;gap:var(--space-1);display:flex}.top-nav a{padding:var(--space-2) var(--space-4);border-radius:var(--radius-full);color:var(--color-on-surface-variant);font-size:.9rem;font-weight:500;text-decoration:none;display:inline-block}.top-nav a:hover{background:var(--color-surface-container-high);color:var(--color-on-surface)}.top-nav a.is-active{background:var(--color-primary-container);color:var(--color-on-primary-container)}.page{max-width:var(--content-width);padding:var(--space-6) var(--space-4) var(--space-8);margin:0 auto}.page--home{padding-top:var(--space-8)}.eyebrow{margin:0 0 var(--space-2);color:var(--color-primary);font-size:.85rem;font-weight:600}.muted{color:var(--color-on-surface-variant)}.hero{max-width:720px;margin:0 auto var(--space-7);text-align:center}.hero__title{margin:0 0 var(--space-4);font-family:var(--font-display);letter-spacing:-.03em;font-size:clamp(2.2rem,1.5rem + 3vw,3.5rem);font-weight:700;line-height:1.1}.hero__lead{margin:0 auto var(--space-5);max-width:620px;color:var(--color-on-surface-variant);font-size:1.1rem}.hero__actions{gap:var(--space-3);flex-wrap:wrap;justify-content:center;display:flex}.section-heading{align-items:baseline;gap:var(--space-3);margin:var(--space-6) 0 var(--space-3);display:flex}.section-heading h2{margin:0}button,.button{justify-content:center;align-items:center;gap:var(--space-2);font:inherit;letter-spacing:.01em;padding:10px var(--space-5);border-radius:var(--radius-full);border:1px solid var(--color-outline-variant);background:var(--color-surface);color:var(--color-on-surface);cursor:pointer;font-size:.9rem;font-weight:500;line-height:1.2;text-decoration:none;transition:background-color .15s,box-shadow .15s,border-color .15s,transform .15s;display:inline-flex}button:hover:not(:disabled),.button:hover{background:var(--color-surface-container-low);border-color:var(--color-outline)}button:disabled{opacity:.5;cursor:progress}.button--filled{color:#fff;background:linear-gradient(135deg,#4f46e5,#6366f1);border-color:#0000;box-shadow:0 1px 2px #4f46e566,0 4px 12px #4f46e540}.button--filled:hover:not(:disabled),.button--filled:hover{background:linear-gradient(135deg,#4338ca,#4f46e5);box-shadow:0 2px 4px #4f46e566,0 8px 18px #4f46e54d}.button--tonal{background:var(--color-secondary-container);color:var(--color-on-secondary-container);border-color:#0000}.button--tonal:hover:not(:disabled),.button--tonal:hover{background:color-mix(in srgb, var(--color-secondary-container) 75%, var(--color-primary))}.button--text{padding-inline:var(--space-3);border-color:#0000}.button--block{width:100%}.card{background:var(--color-surface);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);padding:var(--space-5);box-shadow:var(--shadow-1)}.card+.card{margin-top:var(--space-4)}.stats-grid{gap:var(--space-4);margin-bottom:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(160px,1fr));display:grid}.stat-card{background:var(--color-surface);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);padding:var(--space-5);text-align:center;box-shadow:var(--shadow-1)}.stat-card__value{font-family:var(--font-display);color:var(--color-primary);font-size:2.25rem;font-weight:700;line-height:1.1;display:block}.stat-card__label{margin-top:var(--space-1);color:var(--color-on-surface-variant);font-size:.85rem;display:block}.copy-stats{align-items:center;gap:var(--space-4);flex-wrap:wrap;display:flex}.copy-stats [role=status]{color:var(--color-on-surface-variant);font-size:.85rem}.facilitator{margin-top:var(--space-4);color:var(--color-on-surface-variant);font-size:.9rem}.facilitator summary{cursor:pointer;color:var(--color-on-surface-variant);-webkit-user-select:none;user-select:none;font-weight:500}.facilitator summary:hover{color:var(--color-on-surface)}.facilitator .copy-stats{margin-top:var(--space-3)}.course-grid{gap:var(--space-4);margin-bottom:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid}.course-card{gap:var(--space-2);padding:var(--space-5);background:var(--color-surface);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);color:var(--color-on-surface);box-shadow:var(--shadow-1);flex-direction:column;text-decoration:none;transition:box-shadow .16s,transform .16s,border-color .16s;display:flex;position:relative;overflow:hidden}.course-card:before{content:"";background:var(--course-accent,var(--color-primary));height:4px;position:absolute;top:0;left:0;right:0}.course-card:hover{box-shadow:var(--shadow-2);border-color:var(--color-outline);transform:translateY(-2px)}.course-card--beginner{--course-accent:var(--accent-beginner)}.course-card--intermediate{--course-accent:var(--accent-intermediate)}.course-card--advanced{--course-accent:var(--accent-advanced)}.course-card__eyebrow{letter-spacing:.02em;color:var(--course-accent,var(--color-primary));font-size:.78rem;font-weight:600}.course-card__title{font-family:var(--font-display);letter-spacing:-.01em;font-size:1.2rem;font-weight:600}.course-card__tagline{color:var(--color-on-surface-variant);font-size:.9rem}.course-card__meta{justify-content:space-between;align-items:center;gap:var(--space-3);padding-top:var(--space-3);color:var(--color-on-surface-variant);margin-top:auto;font-size:.85rem;display:flex}.lecture-list{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.lecture-card{justify-content:space-between;align-items:center;gap:var(--space-4);padding:var(--space-4) var(--space-5);background:var(--color-surface);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);box-shadow:var(--shadow-1);transition:box-shadow .16s,transform .16s,border-color .16s;display:flex}.lecture-card:hover{box-shadow:var(--shadow-2);border-color:var(--color-outline);transform:translateY(-1px)}.lecture-card__link{align-items:baseline;gap:var(--space-3);min-width:0;color:var(--color-on-surface);text-decoration:none;display:flex}.lecture-card__code{font-family:var(--font-mono);padding:2px var(--space-2);border-radius:var(--radius-full);background:var(--color-surface-container-low);color:var(--color-on-surface-variant);flex:none;font-size:.75rem;font-weight:600}.lecture-card__title{text-overflow:ellipsis;white-space:nowrap;font-weight:500;overflow:hidden}.lecture-card__link:hover .lecture-card__title{text-decoration:underline}.progress-badge{align-items:center;gap:var(--space-2);color:var(--color-on-surface-variant);vertical-align:middle;flex:none;font-size:.78rem;font-weight:500;display:inline-flex}.progress-badge__track{border-radius:var(--radius-full);background:var(--color-surface-container-high);width:88px;height:6px;overflow:hidden}.progress-badge__fill{border-radius:var(--radius-full);background:var(--color-primary);height:100%;transition:width .24s;display:block}.progress-badge__label{font-variant-numeric:tabular-nums;white-space:nowrap}.progress-badge.is-complete .progress-badge__fill{background:var(--color-success)}.progress-badge.is-complete .progress-badge__label{color:var(--color-on-success-container)}.breadcrumb{margin:0 0 var(--space-3);font-size:.9rem}.breadcrumb a{text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.hint{padding:var(--space-3) var(--space-4);border-left:4px solid var(--color-warning);border-radius:var(--radius-sm);background:var(--color-warning-container);color:var(--color-on-warning-container)}.code-sample{margin:var(--space-4) 0;border:1px solid var(--color-outline-variant);border-radius:var(--radius-md);background:var(--color-surface-container-low);overflow:hidden}.code-sample figcaption{padding:var(--space-2) var(--space-4);letter-spacing:.02em;color:var(--color-on-surface-variant);border-bottom:1px solid var(--color-outline-variant);background:var(--color-surface-container);font-size:.8rem;font-weight:600}.code-sample pre{padding:var(--space-4);margin:0;overflow:auto}.code-sample code{font-size:.875rem}.editor-panel{margin:var(--space-5) 0}.editor-panel__toolbar{justify-content:space-between;align-items:center;gap:var(--space-3);padding:var(--space-2) var(--space-3) var(--space-2) var(--space-4);background:var(--color-surface-container);border:1px solid var(--color-outline-variant);border-radius:var(--radius-md) var(--radius-md) 0 0;border-bottom:none;display:flex}.editor-panel__label{letter-spacing:.02em;color:var(--color-on-surface-variant);font-size:.8rem;font-weight:600}.code-editor{border:1px solid var(--color-outline-variant);border-radius:0 0 var(--radius-md) var(--radius-md);flex-direction:column;height:340px;display:flex;overflow:hidden}.code-editor__surface{flex:1;min-height:0}.code-editor__tabs{background:var(--color-surface-container);border-bottom:1px solid var(--color-outline-variant);gap:2px;padding:2px 4px 0;display:flex;overflow-x:auto}.code-editor__tab{font:inherit;color:var(--color-on-surface-variant);border-radius:var(--radius-sm) var(--radius-sm) 0 0;cursor:pointer;background:0 0;border:none;padding:4px 10px;font-size:.8rem}.code-editor__tab--active{color:var(--color-on-surface);background:var(--color-surface)}.code-editor__tab:focus-visible{outline:2px solid var(--color-primary);outline-offset:-2px}.code-editor__badge{text-transform:uppercase;letter-spacing:.04em;color:var(--color-on-surface-variant);background:var(--color-surface-container-high);border:1px solid var(--color-outline-variant);border-radius:var(--radius-sm);margin-left:4px;padding:0 4px;font-size:.65rem}.quiz-card{margin:var(--space-5) 0;padding:var(--space-5);background:var(--color-surface);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);box-shadow:var(--shadow-1)}.quiz-card h3{margin-top:0}.quiz-options{margin:var(--space-4) 0;gap:var(--space-2);padding:0;list-style:none;display:grid}.quiz-options button{text-align:left;border-radius:var(--radius-md);width:100%;padding:var(--space-3) var(--space-4);color:var(--color-on-surface);justify-content:flex-start}.quiz-options button.is-correct{background:var(--color-success-container);border-color:var(--color-success);color:var(--color-on-success-container)}.quiz-options button.is-wrong{background:var(--color-error-container);border-color:var(--color-error);color:var(--color-on-error-container)}.quiz-answer{margin:var(--space-2) 0 0;padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);background:var(--color-surface-container-high);color:var(--color-on-surface-variant)}.faq-card{margin:var(--space-3) 0;border:1px solid var(--color-outline-variant);border-radius:var(--radius-md);background:var(--color-surface);box-shadow:var(--shadow-1);overflow:hidden}.faq-card summary{cursor:pointer;padding:var(--space-4);justify-content:space-between;align-items:center;gap:var(--space-3);font-weight:500;list-style:none;display:flex}.faq-card summary::-webkit-details-marker{display:none}.faq-card summary:after{content:"";border-right:2px solid var(--color-on-surface-variant);border-bottom:2px solid var(--color-on-surface-variant);width:8px;height:8px;transition:transform .16s;transform:rotate(45deg)}.faq-card[open] summary:after{transform:rotate(-135deg)}.faq-card summary:hover{background:var(--color-surface-container-low)}.faq-card>.markdown{padding:0 var(--space-4) var(--space-4)}.diagnostic-list{margin-top:var(--space-5);padding:var(--space-4) var(--space-5);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-1)}.diagnostic-list h2{margin-top:0;font-size:1.1rem}.diagnostic-group{margin-top:var(--space-4);padding-top:var(--space-4);border-top:1px solid var(--color-outline-variant)}.diagnostic-group h3{margin:0 0 var(--space-2);color:var(--color-on-surface-variant);font-size:.95rem}.diagnostic-items{padding-left:var(--space-5);margin:0}.severity{font-weight:600}.severity-error{color:var(--color-error)}.severity-warning{color:var(--color-warning)}.severity-info,.severity-hint{color:var(--color-on-surface-variant)}.run-results{margin-top:var(--space-5);padding:var(--space-5);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-1)}.run-results h2{margin-top:0}.test-pass{color:var(--color-success)}.test-fail{color:var(--color-error)}.run-logs{background:var(--color-surface-container-high);border:1px solid var(--color-outline-variant);border-radius:var(--radius-sm);padding:var(--space-3) var(--space-4);overflow:auto}.run-error{padding:var(--space-3) var(--space-4);border-radius:var(--radius-sm);background:var(--color-error-container);color:var(--color-on-error-container)}.console-panel{margin-top:var(--space-5);padding:var(--space-5);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-1)}.console-panel h2{margin-top:0}.console-panel__output{padding:var(--space-3) var(--space-4);font-family:var(--font-mono,monospace);white-space:pre-wrap;background:var(--color-surface-container-high);border:1px solid var(--color-outline-variant);border-radius:var(--radius-sm);margin:0;overflow:auto}.preview-panel{margin-top:var(--space-5)}.preview-panel h2{margin-top:0}.dom-preview{min-height:160px;padding:var(--space-3);border:1px solid var(--color-outline-variant);border-radius:var(--radius-lg);background:var(--color-surface)}.dom-preview__frame{background:var(--color-surface);border:0;width:100%;min-height:150px}.markdown{font-size:1.02rem}.markdown h2{margin-top:var(--space-6)}.markdown h3{margin-top:var(--space-5)}.markdown a{text-decoration:underline}.markdown pre{background:var(--color-surface-container-low);border:1px solid var(--color-outline-variant);border-radius:var(--radius-md);padding:var(--space-4);overflow:auto}.markdown code{background:var(--color-surface-container-high);border-radius:var(--radius-xs);padding:2px 5px;font-size:.9em}.markdown pre code{background:0 0;padding:0}.markdown blockquote{margin:var(--space-4) 0;padding:var(--space-2) var(--space-4);border-left:4px solid var(--color-primary);background:var(--color-surface-container-low);border-radius:var(--radius-sm);color:var(--color-on-surface-variant)}.markdown table{border-collapse:collapse;width:100%;margin:var(--space-4) 0}.markdown th,.markdown td{border:1px solid var(--color-outline-variant);padding:var(--space-2) var(--space-3);text-align:left}.markdown th{background:var(--color-surface-container)}.markdown img{border-radius:var(--radius-md);max-width:100%}.auth-status{margin:0;font-size:.85rem}.auth-form{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}.auth-form__label{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.auth-form__input{font:inherit;padding:8px var(--space-3);border:1px solid var(--color-outline);border-radius:var(--radius-full);background:var(--color-surface);color:var(--color-on-surface);font-size:.9rem}.auth-form__status{color:var(--color-on-surface-variant);font-size:.82rem}.auth-form__error{color:var(--color-error);font-size:.82rem}.auth-account{align-items:center;gap:var(--space-2);flex-wrap:wrap;display:flex}.auth-account__email{color:var(--color-on-surface-variant);font-size:.85rem}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}